Trying to drag a modelEntity inside an Immersive space

Goal : Drag a sphere across the room and track it's position

Problem: The gesture seems to have no effect on the sphere ModelEntity. I don't know how to properly attach the gesture to the ModelEntity. Any help is great. Thank you

import SwiftUI import Foundation import UIKit

@main struct testApp: App { @State var immersionStyle:ImmersionStyle = .mixed var body: some Scene { ImmersiveSpace { ContentView() } .immersionStyle(selection: $immersionStyle, in: .mixed, .full, .progressive)

}

}

struct ContentView: View { @State private var lastPosition: SIMD3<Float>? = nil @State var subscription: EventSubscription? @State private var isDragging: Bool = false

var sphere: ModelEntity { let mesh = MeshResource.generateSphere(radius: 0.05) let material = SimpleMaterial(color: .blue, isMetallic: false) let entity = ModelEntity(mesh: mesh, materials: [material]) entity.generateCollisionShapes(recursive: true) return entity } var drag: some Gesture { DragGesture() .onChanged { _ in self.isDragging = true } .onEnded { _ in self.isDragging = false } }

var body: some View {

    RealityView { content in
        
        //1. Anchor Entity
        let anchor = AnchorEntity(world: SIMD3<Float>(0, 0, -1))
        
        let ball = sphere
        
        //2. add anchor to sphere
        anchor.addChild(ball)
        
        content.add(anchor)
        
        
        subscription =  content.subscribe(to: SceneEvents.Update.self) { event in
                        let currentPosition = ball.position(relativeTo: nil)
                        if let last = lastPosition, last != currentPosition {
                            print("Sphere moved from \(last) to \(currentPosition)")
                        }
                        lastPosition = currentPosition
        }
        
    }
    .gesture(drag)
}

}